Definitions

1. adjective

resistant to oil or grease; not affected or damaged by oil or grease

“The oilproof coat is perfect for working in the garage.”

2. adjective

designed or made to exclude or prevent the entry of oil or grease

“This oilproof paint is used for protecting metal surfaces from corrosion.”

3. noun

a material or coating that is resistant to oil or grease

“The oilproof membrane prevents water from seeping into the building.”